mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-28 04:16:57 +08:00
92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import asyncio
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from datetime import datetime
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from nonebot.log import logger
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from nonebot.rule import TrieRule
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from nonebot.matcher import matchers
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from nonebot.typing import Set, Type, Union, NoReturn
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from nonebot.typing import Bot, Event, Matcher, PreProcessor
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from nonebot.exception import IgnoredException, ExpiredException
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from nonebot.exception import StopPropagation, _ExceptionContainer
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_event_preprocessors: Set[PreProcessor] = set()
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def event_preprocessor(func: PreProcessor) -> PreProcessor:
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_event_preprocessors.add(func)
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return func
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async def _run_matcher(Matcher: Type[Matcher], bot: Bot, event: Event,
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state: dict) -> Union[None, NoReturn]:
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if datetime.now() > Matcher.expire_time:
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raise _ExceptionContainer([ExpiredException])
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try:
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if not await Matcher.check_perm(
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bot, event) or not await Matcher.check_rule(bot, event, state):
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return
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except Exception as e:
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logger.error(f"Rule check failed for matcher {Matcher}. Ignored.")
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logger.exception(e)
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return
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matcher = Matcher()
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# TODO: BeforeMatcherRun
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try:
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logger.debug(f"Running matcher {matcher}")
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await matcher.run(bot, event, state)
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except Exception as e:
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logger.error(f"Running matcher {matcher} failed.")
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logger.exception(e)
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exceptions = []
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if Matcher.temp:
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exceptions.append(ExpiredException)
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if Matcher.block:
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exceptions.append(StopPropagation)
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if exceptions:
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raise _ExceptionContainer(exceptions)
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async def handle_event(bot: Bot, event: Event):
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coros = []
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state = {}
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for preprocessor in _event_preprocessors:
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coros.append(preprocessor(bot, event, state))
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if coros:
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try:
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await asyncio.gather(*coros)
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except IgnoredException:
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logger.info(f"Event {event} is ignored")
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return
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# Trie Match
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if event.type == "message":
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_, _ = TrieRule.get_value(bot, event, state)
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break_flag = False
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for priority in sorted(matchers.keys()):
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if break_flag:
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break
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pending_tasks = [
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_run_matcher(matcher, bot, event, state.copy())
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for matcher in matchers[priority]
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]
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results = await asyncio.gather(*pending_tasks, return_exceptions=True)
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i = 0
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for index, result in enumerate(results):
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if isinstance(result, _ExceptionContainer):
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e_list = result.exceptions
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if StopPropagation in e_list:
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break_flag = True
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if ExpiredException in e_list:
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del matchers[priority][index - i]
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i += 1
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